<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>五彩导航</title>
    <style>
        .nav a{
            display: inline-block;
            text-decoration: none;
            width:120px;
            height:58px;
            background-color: pink;
            /*水平居中*/
            text-align: center;
           /*垂直居中  行高等于盒子的高度*/ 
           line-height: 50px;
           color: #fff;

        }
        .nav  .bg1{
            background: url(images/bg1.png) no-repeat;
        }
        .nav  .bg2{
            background: url(images/bg2.png) no-repeat;
        }
        .nav  .bg3{
            background: url(images/bg3.png) no-repeat;
        }
        .nav  .bg4{
            background: url(images/bg4.png) no-repeat;
        }
        .nav  .bg5{
            background: url(images/bg5.png) no-repeat;
        }
        .nav .bg1:hover{
            background: url(images/bg11.png) no-repeat;
        }
        .nav .bg2:hover{
            background: url(images/bg22.png) no-repeat;
        }
        .nav .bg3:hover{
            background: url(images/bg1.png) no-repeat;
        }
        .nav .bg4:hover{
            background: url(images/bg2.png) no-repeat;
        }
        .nav .bg5:hover{
            background: url(images/bg3.png) no-repeat;
        }
    </style>
</head>
<body>
    <div class="nav">
        <a href="#" class="bg1">五彩导航</a>
        <a href="#" class="bg2">五彩导航</a>
        <a href="#" class="bg3">五彩导航</a>
        <a href="#" class="bg4">五彩导航</a>
        <a href="#" class="bg5">五彩导航</a>

    </div>
</body>
</html>